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chgat.c revision 1.1 
      1 /*	$NetBSD: chgat.c,v 1.1 2009/07/06 15:19:49 joerg Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2009 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Joerg Sonnenberger.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __RCSID("$NetBSD: chgat.c,v 1.1 2009/07/06 15:19:49 joerg Exp $");
     34 
     35 #include "curses.h"
     36 #include "curses_private.h"
     37 
     38 int
     39 chgat(int n, attr_t attr, short color, const void *opts)
     40 {
     41 	return wchgat(stdscr, n, attr, color, opts);
     42 }
     43 
     44 int
     45 mvchgat(int y, int x, int n, attr_t attr, short color,
     46     const void *opts)
     47 {
     48 	return mvwchgat(stdscr, y, x, n, attr, color, opts);
     49 }
     50 
     51 int
     52 mvwchgat(WINDOW *win , int y, int x, int n, attr_t attr, short color,
     53     const void *opts)
     54 {
     55 	if (wmove(win, y, x) == ERR)
     56 		return ERR;
     57 
     58 	return wchgat(win, n, attr, color, opts);
     59 }
     60 
     61 int
     62 wchgat(WINDOW *win, int count, attr_t attr, short color, const void *opts)
     63 {
     64 	__LINE *lp;
     65 	__LDATA *lc;
     66 	int newx;
     67 
     68 	attr = (attr & ~__COLOR) | COLOR_PAIR(color);
     69 
     70 	if (count < 0 || count > win->maxx - win->curx)
     71 		count = win->maxx - win->curx;
     72 
     73 	lp = win->lines[win->cury];
     74 	lc = &lp->line[win->curx];
     75 	newx = win->curx + win->ch_off;
     76 	win->curx += count;
     77 	if (win->curx == win->maxx) {
     78 		lp->flags |= __ISPASTEOL;
     79 		--win->curx;
     80 	}
     81 
     82 	while (count-- > 0) {
     83 		lp->flags |= __ISDIRTY;
     84 		if (newx < *lp->firstchp)
     85 			*lp->firstchp = newx;
     86 		if (newx > *lp->lastchp)
     87 			*lp->lastchp = newx;
     88 #ifdef HAVE_WCHAR
     89 		lc->attr = (lc->attr & ~WA_ATTRIBUTES) | attr;
     90 #else
     91 		lc->attr = attr;
     92 #endif
     93 		++lc;
     94 		++newx;
     95 	}
     96 
     97 	return OK;
     98 }
     99